004+
005+ Warning: array_diff_key() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s/array_diff_key_variation4.php on line 21
006+ NULL
007+
008+ Warning: array_diff_key() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s/array_diff_key_variation4.php on line 22
009+ NULL
004- array(1) {
005- [-7]=>
006- string(3) "-07"
007- }
008- array(1) {
009- [-17]=>
010- string(3) "-17"
011- }
012+
013+ Warning: array_diff_key() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s/array_diff_key_variation4.php on line 21
014+ NULL
015+
016+ Warning: array_diff_key() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s/array_diff_key_variation4.php on line 22
017+ NULL
014- array(1) {
015- [-7]=>
016- string(3) "-07"
017- }
018- array(1) {
019- [-9]=>
020- string(4) "-011"
021- }
020+
021+ Warning: array_diff_key() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s/array_diff_key_variation4.php on line 21
022+ NULL
023+
024+ Warning: array_diff_key() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s/array_diff_key_variation4.php on line 22
025+ NULL
024- array(1) {
025- [10]=>
026- string(3) "0xA"
027- }
028- array(1) {
029- [18]=>
030- string(4) "0x12"
031- }